{"product_id":"seiko-selection-open-heart-hfb002j-mens-watch","title":"Seiko Selection Open Heart HFB002J Men's Watch","description":"\u003cp data-path-to-node=\"6\" id=\"p-rc_81ce97118b7d8754-352\"\u003e\u003cspan class=\"citation-1190\"\u003eThe \u003c\/span\u003e\u003cspan class=\"citation-1190\"\u003eSeiko Selection HFB002J\u003c\/span\u003e\u003cspan class=\"citation-1190\"\u003e (released within the acclaimed Japanese domestic \u003c\/span\u003e\u003cspan class=\"citation-1190\"\u003eSeiko Selection S Series Mechanical Collection\u003c\/span\u003e\u003cspan class=\"citation-1190 citation-end-1190\"\u003e) is a refined, high-performance Japanese automatic mechanical open-heart dress-sports timepiece.\u003csup class=\"superscript\" data-turn-source-index=\"1\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-1189 citation-end-1189\"\u003eStanding as the sophisticated next-generation successor to the beloved SCVE051, this modern reference encapsulates the core ethos of the Seiko Selection lineup: an uncompromising commitment to functional versatility, timeless Japanese design aesthetics, and accessible mechanical craftsmanship.\u003csup class=\"superscript\" data-turn-source-index=\"2\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-1188\"\u003eAcross horology collector forums, everyday carry communities, and Japanese watch circles, it has earned defining community nicknames—the \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"Blue Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"S Series Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"Semi-Skeleton\"\u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e, \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"Mechanical S Series\"\u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e, or \u003c\/span\u003e\u003cspan class=\"citation-1188\"\u003e\"Ocean Blue Open Heart\"\u003c\/span\u003e\u003cspan class=\"citation-1188 citation-end-1188\"\u003e—for its deep sunburst blue dial, open balance-wheel aperture, faceted three-dimensional indices, and balanced 40.0mm case architecture.\u003csup class=\"superscript\" data-turn-source-index=\"3\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-1187 citation-end-1187\"\u003eIt unites a sculpted 316L solid stainless steel case in an ergonomic 40.0mm diameter with a radiant radial deep blue dial face, three-sided diamond-cut hour batons, an open-heart mechanical window revealing the escapement, an in-house Japanese automatic mechanical movement, durable Hardlex crystal glass, certified 100-meter water resistance, and an integrated solid stainless steel construction with an easy-adjust sizing system.\u003csup class=\"superscript\" data-turn-source-index=\"4\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Perfectly calibrated for gentlemen seeking an eye-catching, high-grade mechanical daily wearer that transitions effortlessly from executive boardroom meetings and formal occasions to relaxed weekend gatherings. \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003eThe defining visual centerpiece of this HFB002J reference is its multi-layered, sunburst blue dial face. Finished with an ultra-fine radial brushing technique, the deep blue surface dynamically plays with ambient light, shifting between vibrant royal blue in direct lighting and deep oceanic navy in dim conditions. Positioned prominently at 9 o'clock is a signature open-heart circular aperture framed by a polished silver-tone border, offering an unobstructed view into the oscillating balance wheel and escapement mechanism to reveal the living mechanical rhythm of the watch. Circling the perimeter are three-dimensional, three-sided faceted applied baton hour markers with wide, rainbow-ground chamfered facets that reflect light with brilliance. Faceted silver-tone sword-style hour and minute hands sweep over the face alongside a fine central seconds hand for instantaneous legibility. The outer minute track is cleanly calibrated with delicate demarcations, ensuring an uncluttered, balanced display. Framing the dial is a fixed, mirror-polished solid stainless steel bezel that flows seamlessly into the case architecture. \u003cspan class=\"citation-1186\"\u003eBeneath its tailored exterior, the watch is driven by Seiko’s proven in-house \u003c\/span\u003e\u003cspan class=\"citation-1186\"\u003eCalibre 4R38\u003c\/span\u003e\u003cspan class=\"citation-1186 citation-end-1186\"\u003e Japanese automatic mechanical movement, engineered and manufactured at Seiko’s dedicated horological facilities in Japan.\u003csup class=\"superscript\" data-turn-source-index=\"5\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Operating at a steady frequency of 21,600 vibrations per hour (3 Hz), this 24-jewel self-winding caliber harnesses the kinetic energy of the wearer’s wrist to wind the mainspring, delivering approximately 41 hours of autonomous power reserve on a full wind. Designed purposefully without a calendar mechanism to preserve dial symmetry and the purity of the open-heart layout, the caliber features both automatic self-winding and manual hand-winding capabilities, along with a hacking seconds (stop-seconds) mechanism that halts the seconds hand when the crown is pulled out for down-to-the-second time synchronization. Built with Seiko’s proprietary Diashock shock-absorbing architecture, the movement delivers dependable stability rated to a factory precision tolerance of +45 to -35 seconds per day and incorporates JIS Class 1 magnetic resistance (4,800 A\/m), protecting timekeeping accuracy against daily electromagnetic exposure from smartphones and laptops.  \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003eThe case is engineered with versatile, contemporary dress-sports proportions, measuring an official 40.0mm in case diameter with a case profile thickness of 11.8mm, a compact 46.2mm lug-to-lug distance, and a standard 20mm lug width, delivering an ergonomic, flush drape across wrists of all sizes. The solid 316L stainless steel case architecture combines vertical hairline satin brushing across the upper lugs with mirror-polished case flanks and bevels to create a sharp, dimensional profile. Dial protection is provided by a high-grade flat Hardlex crystal engineered to withstand everyday impacts and surface scratches. Built for dependable everyday resilience, the watch features an ergonomic fluted pull-out crown at 3 o'clock and an exhibition see-through screw-down caseback that allows the wearer to view the mechanical balance and oscillating rotor, while securing an impressive 10-bar (100 meters \/ 330 ft) water resistance rating, making it fully resilient against rain, accidental splashes, and swimming. The timepiece comes completed on an integrated solid stainless steel multi-link construction featuring satin-brushed outer rows and polished center link accents, secured by a sturdy one-push three-fold deployment clasp with an easy-adjustment sizing system.\u003c\/p\u003e","brand":"MonaWatch","offers":[{"title":"Default Title","offer_id":67704588665146,"sku":"HFB002J","price":1160.0,"currency_code":"AED","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0920\/5858\/3354\/files\/NewProject_0bbe83ec-0865-4948-ba78-669de34c4ff6.webp?v=1792048747","url":"https:\/\/www.monawatch.com\/products\/seiko-selection-open-heart-hfb002j-mens-watch","provider":"MonaWatch","version":"1.0","type":"link"}